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压铸铝合金用铣刀表面微织构及切削特性研究

本站小编 Free考研考试/2022-02-12

何利华1, 潘建峰2(), 倪敬1, 冯凯1, 崔智1
1.杭州电子科技大学 机械工程学院, 杭州 310018
2.杭州职业技术学院 特种设备学院, 杭州 310018
收稿日期:2020-10-21出版日期:2021-06-28发布日期:2021-06-30
通讯作者:潘建峰E-mail:57776984@qq.com
作者简介:何利华(1987-),男,浙江省杭州市人,博士,讲师,从事绿色微纳制造技术、精密特种加工技术研究
基金资助:国家自然科学基金项目(51775153);浙江省自然科学基金项目(LQ20E050012);浙江省基础公益技术研究计划(LGG20E050002)

Surface Micro-Texture and Cutting Characteristics of Milling Cutter for Die-Casting Aluminum Alloy

HE Lihua1, PAN Jianfeng2(), NI Jing1, FENG Kai1, CUI Zhi1
1. School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
2. Special Equipment Institute, Hangzhou Vocational and Technical College, Hangzhou 310018, China
Received:2020-10-21Online:2021-06-28Published:2021-06-30
Contact:PAN Jianfeng E-mail:57776984@qq.com






摘要/Abstract


摘要: 针对压铸铝合金在切削力影响下加工精度低、表面质量不高等问题,提出在铣刀前刀面加工沟槽和V型阵列表面微织构的方法.通过三向力传感器监测并分析铣削过程中的铣削力变化情况,重点分析y向铣削力(Fy)频谱特性.将采集到的Fy 进行快速傅里叶变换,得到3种不同铣刀Fy 的频谱分析图,利用表面形貌和表面粗糙度评价表面微织构铣刀的铣削性能.结果表明:相较于普通铣刀在x、y和z方向的铣削力均值,沟槽阵列表面微织构铣刀的均值分别降低了3.8%、0.29%和11.7%,V型阵列表面微织构铣刀的均值分别降低了8.5%、14.3%和12.4%;在6倍主轴频率处的Fy高频幅值的大小关系为普通铣刀>沟槽阵列铣刀>V型阵列铣刀;采用微织构铣刀加工的表面,其表面粗糙度比普通铣刀的小,且V型阵列铣刀加工工件的表面质量最好.研究结果将为压铸铝合金精密铣削提供理论依据.
关键词: 表面微织构, 压铸铝合金铣削, 铣削力, 频谱特性, 表面粗糙度
Abstract: Aimed at the problems of low processing accuracy and surface quality of die-casting aluminum alloy under the influence of cutting force, a method of using surface micro-textured milling cutter with groove and V-shaped arrays on the rake face was proposed. The variations of milling forces were monitored and analyzed by using tri-direction-force transducer, and the spectrum characteristics of the y-direction milling force (Fy) was emphatically analyzed. The spectrum analysis diagrams of Fy of three different milling cutters were obtained by fast Fourier transform. The milling performance of the micro-textured milling cutters was evaluated by surface topography and surface roughness. The results show that compared with the average values in the x, y, and z directions of the conventional milling cutter, the values of the groove micro-structured milling cutter are reduced by 3.8%, 0.29%, and 11.7%, while those of the V-shaped micro-structured milling cutter are reduced by 8.5%, 14.3%, and 12.4%. The relationship between high frequency amplitudes of Fy at 6 times spindle frequency are proposed as conventional milling cutter>groove arrays milling cutter>V-shaped arrays milling cutter. Compared with the conventional milling cutter, the surface roughness is decreased when using micro-textured milling cutters, and the surface quality of the workpiece processed by the V-array milling cutter is the best. This paper will provide a theoretical basis for precision milling of die-cast aluminum alloys.
Key words: surface micro-texture, milling die-casting aluminum alloy, milling force, spectrum characteristics, surface roughness


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